Changes In Parameters And Causes Of Icl Lens Exchange After Icl Surgery: A Retrospective Clinical Study

This study aims to analyze the causes of ICL lens exchange and the changes in related parameters after ICL surgery through a retrospective clinical study, providing references for clinical practice to optimize surgical plans, reduce the exchange rate, and improve surgical success and patient satisfaction.

The implantation of the Implantable Collamer Lens Implantation Surgery (ICL) has been widely used in clinical practice in recent years as a safe and effective refractive correction surgery, especially for patients with complex refractive errors such as high myopia. However, some patients may require ICL lens exchange after surgery, which not only affects the visual recovery of patients but also increases the surgical risks and economic burden on patients.

This study collected data from 56 eyes of patients who underwent ICL surgery and required ICL lens exchange in our hospital from 2023 to 2024, including 34 eyes in the high vault group, 18 eyes in the low vault group, and 4 eyes in the ICL rotation group. By analyzing key indicators such as vault, anterior chamber angle, anterior chamber depth (ACD), white-to-white distance (WTW), ciliary spur-to-ciliary spur (STS) horizontal and vertical distances, and lens vault (STSL) before surgery and one day after surgery, paired sample t-tests were used to compare the differences in vault before and one day after surgery. Pearson correlation analysis was also conducted to explore the relationship between vault differences and other parameters.

That the vault difference before and after exchange was positively correlated with preoperative vault,ACD,and anterior chamber angle.The main causes of high vault included larger WTW measurements compared to STS measurements,small differences between STS horizontal and vertical distances,and discrepancies between the ciliary sulcus morphology and ICL haptic positioning.In the low vault group,the vault before surgery was relatively low,and the vault difference before and after exchange was related to smaller WTW measurements compared to STS measurements and larger STSL.In the ICL rotation group,significant improvements in vision and residual astigmatism were achieved after adjusting the ICL model and placement position.

The conclusions of this study indicate that the causes of ICL lens exchange after surgery are complex and closely related to various ocular parameters.Accurate preoperative measurement and assessment of WTW,STS,STSL,and other parameters,combined with the anatomical characteristics of the patient's eye,are of great significance for selecting the appropriate ICL model and placement method to reduce the rate of ICL lens exchange and improve surgical outcomes.Future research should further optimize preoperative evaluation methods and explore more precise surgical plans to enhance the safety and effectiveness of ICL surgery,bringing benefits to more patients with refractive errors.